black lead

简明释义

1. 石墨; 2. 笔铅; 3. 黑铅; 4. 炭精;

英英释义

例句

1.Artists often prefer black lead pencils for their rich dark tones.

艺术家们通常更喜欢黑铅铅笔，因为它们的深色调丰富。

2.The black lead in this pencil is perfect for writing on glossy paper.

这支铅笔中的黑铅非常适合在光面纸上书写。

3.When I need to erase, I always choose a pencil with black lead since it erases cleanly.

当我需要擦除时，我总是选择带有黑铅的铅笔，因为它擦得很干净。

4.I prefer using a pencil with black lead for sketching because it gives me more control.

我更喜欢使用带有黑铅的铅笔进行素描，因为它让我更容易掌控。

5.The black lead in my mechanical pencil broke during the exam.

我在考试期间，机械铅笔里的黑铅断了。

作文

The term black lead refers to a type of graphite used in pencils and other writing instruments. Graphite is a form of carbon that is soft and can easily leave marks on paper. Historically, the use of black lead in pencils dates back to the 16th century when a large deposit of graphite was discovered in Borrowdale, England. This material was initially shaped into sticks for writing, and it was commonly referred to as 'plumbago.' Although many people still colloquially refer to the core of pencils as 'lead,' it is important to note that it does not contain any actual lead metal. Instead, it is primarily made of graphite mixed with clay, which helps to harden the pencil and control the darkness of the mark it leaves.In modern times, black lead pencils come in various degrees of hardness, ranging from very soft (which produces darker marks) to very hard (which produces lighter marks). Artists and illustrators often prefer softer black lead pencils for shading and creating deep contrasts in their drawings, while writers may choose harder pencils for crisp, clear lines. The versatility of black lead makes it a popular choice among students, professionals, and artists alike.The environmental impact of producing black lead pencils is also worth considering. The process of mining graphite can be harmful to the environment if not done sustainably. However, many manufacturers are now taking steps to ensure that their products are sourced responsibly. Additionally, there is a growing trend towards using recycled materials in the production of black lead pencils, which helps to reduce waste and promote sustainability.In conclusion, the term black lead encompasses more than just the material used in pencils; it represents a rich history of writing and art. Understanding the significance of black lead allows us to appreciate the tools we use for communication and creativity. Whether you are sketching a masterpiece or jotting down notes, the humble black lead pencil remains an essential instrument in our daily lives.

“黑铅”这个术语指的是一种用于铅笔和其他书写工具的石墨。石墨是一种软的碳形式，能够轻易地在纸上留下痕迹。历史上，黑铅在铅笔中的使用可以追溯到16世纪，当时在英格兰的博罗代尔发现了大量的石墨矿藏。这种材料最初被制成棒状用于书写，通常被称为“铅矿”。尽管许多人仍然口头上将铅笔的芯称为“铅”，但重要的是要注意它实际上并不含任何铅金属，而是主要由石墨与粘土混合而成，这有助于硬化铅笔并控制其留下的痕迹的深浅。在现代，黑铅铅笔有多种硬度，从非常软（产生较深的痕迹）到非常硬（产生较浅的痕迹）。艺术家和插画师通常更喜欢较软的黑铅铅笔来进行阴影处理和创作深对比的图画，而作家可能选择较硬的铅笔来获得清晰、明亮的线条。黑铅的多功能性使其成为学生、专业人士和艺术家们的热门选择。生产黑铅铅笔的环境影响也是值得考虑的。如果不以可持续的方式进行采矿，可能会对环境造成危害。然而，许多制造商现在正在采取措施，确保他们的产品来源负责。此外，使用回收材料生产黑铅铅笔的趋势日益增长，这有助于减少浪费并促进可持续发展。总之，术语黑铅不仅仅涵盖了铅笔中使用的材料；它代表了书写和艺术的丰富历史。理解黑铅的重要性使我们能够欣赏我们用于交流和创造的工具。无论你是在素描一幅杰作还是在记下笔记，谦逊的黑铅铅笔仍然是我们日常生活中不可或缺的工具。